onOne Mask Pro 4.1, Plug-in Masking Software for Windows and Macintosh, Full Version.,onOne plug-ins now compatible with Photoshop CS5 include

Mask Pro 4 provides a complete collection of Photoshop plug-in tools that allow users the unprecedented flexibility of tackling the most challenging masking job. This version focuses on teaching the user how to best use each comprehensive toolset for masking a wide range of images. Mask Pro 4 provides support for Wacom Pen Tablets including pressure sensitivity. If a user presses hard with their pen, they will get a hard edge to their mask. If they press lightly, they will get a soft, subtle edge to their mask.

Mask Pro 4 uses the concept of "keep colors" and "drop colors" chosen by the user and then based on user selections, the Mask Pro algorithm will remove only the selected colors from an image. When a "drop color" is found in another pixel, Mask Pro will remove only that color value from the pixel, leaving that pixel semi-transparent. This allows Mask Pro to minimize the edge halo effect often seen when masking a transparent object or edge.

Users can now have multiple navigator windows open, each showing a different view from the original unmasked imaged, the masked image against a solid color background, the masked images above the new background, black and white mask, and even the exclusive clean-up mask view. Additional refinements like seeing numerical values in tool palettes, auto-scrolling when the edge of the image is hit, a hot-key to constrain the pen tool to 45 degree angles and enforcing highlighted zones all make Mask Pro more functional for power users and easier to learn for novices.